Edward b



Jan. 1, 1924 1,479,715

E. B. HESS TYPEWRITING MACHINE Filed Jan. 14 3.922

f m WWW EJwanZ B. Hess whis Afiorwedfs chines, and in the H a fixed axisbelow the key levers and are .celerated velocity.

Patented Jan. 1, 1924.

UNITED STATES 1,479,715 PATENT OFFICE.

EDWARQ B. HESS, OF NEW YORK, N. Y., ASSIGNOR T0 ROYAL TYPEWRITERCOMPANY,

INC., OF NEW YORK, N. '22, A. CORPORATION OF NEW YORK.

TYPEWRITING MACHINE.

Application filed January 14, 1922. Serial No. 529,179.

To all whom it may concern:

Be it known that l, Enwnuo B. Hess, a citizen of the United States,residing at Manhattan Beach, in the county of Kings, New York, and Stateof New York, have in vented certain new and useful Improve merits inTypewriting Machines, of which the following is a specification.

This invention relates to, typewriting n1achines of the front strike,visible kind, in which the type bars are impelled to tin printing pointon the platen by the depression of the key levers which are cormccted tothe heels of the type bars by flexing con nections which are of suchnature as to more the type bars toward the platen with ac- S uchmechanism, broadly all standard Royal our machine now in use and shownin my Patent No. 1, 90,708 of Sept. 13, 1921, I have illustrated anarrangement of flexing connections between the key levers and the typebars whereby the noise produced by the impact of the type bars on theplaten is greatly reduced. According to my present invention, the broadfeatures shown in such patent are embodied in a novel arrangement of theconnections between the key levers and the type bars. y presentinvention also in olves novel features of construction in whichprovision for reducing noise is not nccessnrlv y made, but which areuseful in machines of differ ent types. Universal bar mechanism constructed in accordance with my present in vention is of an entirely newform and may be used'in variouskindsof machines.

In the preferred way of carrying out my present invention, the heels ofthe type bars are connected to relatively'short lacy levers by linkswhich are inclined forwardly and downwardly, their front lower endsbeing connected with the upper ends oi vertically arranged levers whichare pivotnlly mounted at their lower ends to move about stated, is foundin operatively connected with the key levers by slot and pin connectionsarranged in a novel way. The key levers are normally held in upperposition by springs and springs are also employed to return the typebars to the normal position of rest and to hold them there. Theconnections between the key levers and the type bars are such that. thenieclisnisni is iockod when the parts ing or dead center position preerablg is ars made between the pivots of the type and the pivotalconnections on the opposite ends of the pull links with the heels of thetype bars and the upper ends of the verti cal lovers to which the frontends of the pull links are connected. The vertical overs are slot andpin connected with the short key levers near their rear ends, the pivotsabout which the vertical levers turn icing located below the key levers.In this way, when a type bar is at rest, it is so looked that it cannotrebound or rise until the associated key lever is depressed. In this newway of connecting the type bars with the key levers, it will be observedthe power so plied by the key levers is applied to the exing connectionsbetween their pivotal connections with the heels of the type bars andthe support about which all of the front vertical lovers more.

The escapcment n'ieohanisnl in my new machine is similar to that foundin all standard Royal machines, but the universal bar mechanism isentirely difl'erent. The universal bar proper is located in the frontpart of the machine above the front portions of the key levers andbetween them and the front ends of the type bars. This universal barproper, which is in the form of a horizontally arranged rod, is carriedby vertical arms attached to a horizontal rock Shaft carrying adownwardly extending arm, link connected with a vertical lever in turnconnected by a link with the'escapement mechanism. The universal barmechanism is operated by the type bars instead oil by the key levers asusual, each type bar being equipped with a horizontally arranged link,the rear end. of which is pivotally connected with the associated typebar near its heel, the. front end of which is formed with rommencementof the momentum a. hook or loop through whirh the front; rod of theuniversal bar Inerhanism extends. Normally the loops or hooks are out ofoperative connection with the universal liar I'flil, and are thus heldby springs, but as the type bars approach the platen flnil arrive at theperiod, the hooked or looped ends of the Ul'llYLISal bar links engagethe universal bar, and thereafter the universal our meehaniira isoperated to actuate the GSLHPEHIQHl.

In the accompanying drawings Figure 1 shows partly in elevation andpartly in section. portions of a {room-filing machine embodying myimprm'ements.

Figure 2 is a diagrammatic view Showing by full lines the position ofcertain parts at the eommeneei'nent l the momentum period, and by (lotand lines the position of these parts at he tune that the type bursimpin the platen.

figure 3 is a developed plan YlEW subst antlally on the irregular line3-3 Fi 1. showingthe arrangement of the universal our links indicatingthe cliflerencvs in shape therein at the center anil at the sides of themachine, the rork shaft: and the links which sup ort the front. rod ofthe universal bar mec anism being moved from under the front ends of thelinks in fililel{()illfl1'('tltitll-- ly illustrate the manner inwills-l1 they are connected with other parts oi the mechanism.

Part of a typewritinp' marhine rarriage indicated at A, and Binilirair-r. a platen. A type bar segmient is shout: at i. a {we barguide at llanil eseupenu-nt iunrlninisni at E. The platen with itscarriage are lllUiLCl vertically for ease printing Elllt'l the caninement mechanism mores 'ertig-ally uith the carriage. nected with thesegment at r zunl normally lie horizontally [1S shown. their outer froniends belo supported by a (illiilllfll'lill lype liar rest (L The keylevers ll are -onuiarzr tively short and their rear mails are ivotallymounted at A in a snngmrr l. :lust, shed J arranged over lull pivots ofthe key levers, and springs K attm'heil to the (lust ShPll and to thehey love] 1. serve {n return the levee; in normal position. The upwardmoremeni of the key levers is an rested by a (liSlliUHHl shi l l, ofusual roustruction.

The type bars are ronnertml lo the key levers by pull links M and leversN, tl1e latter being arranged rertii'ally lml' slightly inclined fromllii'll lower ends upwardly and forwardly when in normal position. Thelower ends of the levers N are pirotaily mounted in a support (7. all ofSlllll levers being pivoted to more about the axis of the pivot rod 0which extends through the lower ends of all the levers The upper ends ofthese levers'are couneetecl b the links The type llillS F are pii'olailymin M with the heels of the type bars at at. llach lever N is eounerteil to the. associated key lever by sliding or sloi. and pinconneotion.The slot n in each lever is located about midway between its upper andlower enrls and is inclined from its upper towards its lower em]. Thepin it extends through the slot u and preferably rarries a flangedroller as shown. When a key lever is ilepresserh the pin 1:. movesdownwardly in the inclined slot and in so doing, moves the upper end ofthe lever T :nraril, time pulling the link M forward anrl causing theassociated type i351? in more inward the platen. A full depression offlu: hey lever causes the associated type our to more to a positionconsiderably in ad ent-e of he plaren, the further movement of the typeliar to the printing point being caused by iis momentum. The position towhich the type bar moved by i'he depression of the, associated key leveris indiraf'eil at X. At this time, the related parts ooeupy the position shown by dotted lines in Figure l. and by full lines in Figure 2,where it will observed the pivot of the type liar and the points a; and3 where the link M joins; the type liar and the lever N are in. linewith (ill'll other. i. e, in a. (lead renter or toggle locking position.but the momentum of the type liar ('lI'llPS it to the printing point asimlirufml by the lut and dash line in Figures llllll 2. it beendemonstrated that this type of flexing eonneeiion is most rrrrirwl-iv inmachines involving the melee reilming features of in prior inreniion aswell as in oiller machines. The feature of looking the type bare when intheir normal position, which involves the prevention of a li.l )iil(lthereof when arriving as normal position, is an important 'i'ealure ofthe aclion.

in the mar-lune shown. the rpe liar segment is Rviniwirrulnr ninl the tvpc liars are znra1igtl in :1 seini r'iri-ulnr ei-rii-s the pix-o ls ofthe type liars living at iiill'rri-ul ilisiuneee l'rou: ill! levylevers. Forihis. reason the pull iinlis :it the (llllli of the machineare nerte-il to differ nt points on the laeelE of the Li li? llZH'S fromthose at nhieh are ronnvrteil in the ventral portion of ihe machine. Itwill he understood also that for ihe l'iilFHllH allow staloil lhe leversN at {he lIHlS of [he mar-lune are somewhat longer than suiil levers inthe central por tion of ill machine. By time varying the lengths of saidlevers :uul varying the poinls of commotion of the pull links with theheels of the type liars, a uniform operation of the inw-lianism isefierted.

The universal liar mechanism. (liflers ma terially from that used in thohtanilurd Royal machine, most of the mechanism in the present instancebeing arranged in the front part of the machine below the type bars, andfor the most part above the key levers. The universal bar proper is inthe form of a rod Q carried by vertical arms q attached to a rock shaftR from which depends an arm I connected. by a link a with a verticallever S pivotally mounted at its lower end on the support 0. The upperrearwardly extending and of this lever is connected by the link T with arocker plate 8 of the escapement mechanism, An arm r projecting upwardlyand rcarwardly from the rock shaft R limits the return movement of therock shaft by striking against the frame piece L.

The universal bar is operated by links V connected to the type bars neartheir rear ends and having hooked or loopedends 1: through which the rodQ. extends. Normally the iron; ends of the links V are out of contactwith the rod Q, but when a key lever is depressed, the associated typebar is moved toward the printing point as before described and the frontend of the link 11 engages therod Q and the universal bar mechanism isoperated through the connec tions lecture explained. This operation ofthe universal har occurs at the commence ment and lurin the momentumperiod of the type bars. gprings W attached at their rear ends to thelink V have their front. ends attached to a plate W and serve to returnthe type bars and parts connected therewith to normal position. In otherwords, thesesprings are employed to return the type bars to normalposition and to hold them in place against vibration and they, ofcourse, also return the universal bar links V to their normal position.

By reference to Fi ure 3, it will be ubserved that the linksare soshaped as to accommodate the varying differences of the type bars in thesegment, the levers at the center of the machine being straight whilethose on the OllJQSl'lG sides of the center are bent and, urthcrmorc,the connection of the front ends of the links with the type bars variesin order that the universal bar mechanism may be operated uniformly byall the keys.

The escapcmont mechanism, as before stated, is in general of usualconstruction, and need not he described in detail. A spring E attachedto thc rockcr plate 6', is also attached to an arm 6 of the escapementframe and serves not only to return the escapement rocker plate tonormal position, but also the universal bar mechanism.

The mechanism shown and described operates harmoniously in the operationof different parts of the machine. The type. action proper is such as toreduce noise when the type bars impinge the platen, and this type actionis so related with the uni versal bar mechanism and escapement mechanismthat the escapement mechanism is operated during the latter part of themovement of the type bars to the platen and during what is known as themomentum periodf thereof.

The cushioned rest G is supported on a vertical plate G which has anoverhang ing top portion g. This late serves as a dust guard and it isslotte at its lower end to provide a comb guide for the key levers.

I claim as my invention:

. 1. In a typewriting machine the combine tion witlrthe key levers andthe type bars of flexing connections therelictween, comprising verticallevers mounted to turn about fixed axes, links connecting the free upperends of said vertical levers with the type bars. and sliding connectionsbetween said vertical levers and the rear of the key lovers, thewnncctiou etween each link and a t 'pe our, and between said link andthe vertical lever being moved by the full depression of a key lever toa togglelocking or dead center osition with the type bar a considerableistance from the platen when the sliding connections have reached theirlower limit of movement the further movement of the type bar to theplaten being caused by its momentum.

2. In a typewriting machine the combination with the key levers and thetype bars of flexing connections therebetween, comprising verticallevers mountcd to turn about fixed axes located below the key levers,links connecting the free, upper ends of said vertical levers with theheels of the type liars, and slot and pin connections between saidvertical levers and the rear portions of the key levers, the connectionbetween each link and a type bar and between said link and said verticallever being moved by the full depression of an associated key into astraight line with the pivot of the type bar when the key lever is fullydepressed, the further movement .of the type bar to the platen beingcaused by its momentum.

3. In a t pewriting machine the combina: tion with tile key levers, typebars, and connections therebtween, of escapement mechanism, universalbar mechanism located in the front art of the machine, a connectionbetween t a universal bar mechanism and the esca ment mechanism, linksextending forwardy from the rear portions of the ty 8 bars tooperatively engage the universaFbar mechanism only during a momentumperiod in the movement of the t 'pe bars to the platen, and s ringsexten ing forwardly from the lin s to a fixed support and acting toreturn the type bars to normal position.

4. In a. typcwriting machine the combina tion with the key levers, t pebars, and connections therebetween, 02 a universal bar mechanismcomprising a rod in the front part of the mac inc between the key loversortions Y and type bars, and links extending furwarrily from the ty ebars to said rod 0 opemtivelv engage tile same during the ezr cursion ofthe type bars to the lawn.

5. In a iypewriting Inna-brine, t 19 combina tion with be key levers, t-'pe bars, and can-- nections lZhLE'GlJEtWBEBD, 01 a univarsal ba'rmechanism comprising a lmrizontallv ranged red lying between the keyavers and 1h? type bars links extenciing forwardly from said type barsand having lost metien connection with the 11 a rock shaft sup portingsaid red, escapement mevhanism, and means mnneciing the mck shaft withthe escapvment mechanism.

6. In a fypmvriting machine the cnmbination \viili the kvy levvrs andthe type bars of connections hetwnun the levers and the typp barswhereby the latter are Open ated, escapx-lmtnt mechanism, and universalbar nwrhanism intvrposed betwegn the escapement mechanism and the typebars, comprising a horizontally a ranged rod,

links exi'endin forwardly mm fin type; bars and enga Jug vsaid rud a mashaft; rm which said rm is supported, a vmiical ifiVEZ link connevtedwith said rock Sliifi and link cwmectinn hctween said verciaai lei-'2?and Lizanscapement mechanism.

3 In a iypewriting machine the mmbinaties: with the type bars and theievem sf connections therehetween, escaga zmeni mechanism and univarsalbar mesiianism csmprising a horizonally arrangad ted operativlycimnected with the iescapement mechanism, and universal bar linksamnesting the iype bars with said will tbs naive!- sal bar links in heceniral pns'tion of the machine being straight while Thnse at theopposite sifies of the center are bani; min their frontpertions'inwardly inwards the middle of the machine.

In tgstimony whereof, I ham hereunto name.

subscribed my EDWARE Bi.

